An intimate mixture of ${Fe}_{2} O_{3}$ and aluminium powder is called ___________.

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Solution

Thermite is an intimate mixture of finely powdered Aluminium ( $Al$ ) and Iron oxide ( ${Fe}_{2} O_{3}$ ) that produces a very high temperature on combustion, which is used in welding and for incendiary bombs and is also used as solid fuels in rockets.
Reaction would be:
$\underset{(F e r r i c o x i d e)}{\underset{⏟}{F e_{2} O_{3} (s)}} + \underset{(A l u m i n i u m p o w d e r)}{\underset{⏟}{2 A l (s)}} \to \underset{(I r o n)}{\underset{⏟}{2 F e (s)}} + \underset{(A l u m i n i u m o x i d e)}{\underset{⏟}{A l_{2} O_{3} (s)}} + H e a t$
3. This reaction is used for thermite welding, to connect railway tracks and in metal refining.
Therefore, an intimate mixture of ${Fe}_{2} O_{3}$ and aluminum powder is called Thermite.

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Which separation technique is used to separate iron powder from a mixture of iron and aluminium powder?

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